What is a common outcome of improper positioning of the humeral component during shoulder arthroplasty?

Improper positioning of the humeral component during shoulder arthroplasty can lead to a reduced implant survival time. This is primarily because when the humeral component is not aligned properly with the glenoid, it can create an unnatural joint mechanics, leading to increased wear, loosening of the implant, and in some cases, failure of the prosthetic joint.

The long-term stability of the implant relies on correct positioning, which helps distribute forces evenly and minimizes the risk of complications such as dislocation or impingement. Consequently, if the humeral component is not correctly positioned, it may lead to a situation where the forces acting on the joint compromise the integrity of the implant, resulting in a shorter lifespan.

In contrast, improper positioning generally does not result in increased strength or enhanced stability and is more likely to lead to decreased range of motion due to compromised joint function. Therefore, the implications of incorrect positioning primarily revolve around reduced implant survival and the overall effectiveness of the surgical intervention.